Time, Speed & Distance · Question 21 · Medium
A car runs for 2 hours at 50 km/h, then 3 hours at 60 km/h, and finally 1 hour at 80 km/h. What is its average speed for the whole journey?
- 62 km/h
- 63 1/3 km/h
- 60 km/h
- 58 km/h
Answer and explanation
Answer: C. 60 km/h
Explanation: Total distance = 100 + 180 + 80 = 360 km in 6 hours, so the average speed is 360 ÷ 6 = 60 km/h. (The simple average of the three speeds, 63 1/3, is wrong because the times differ.)
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